Combination straightening block and test roll



Sept

H A. DOHERTY COMBINATION STRAIGHTENING BLOCK AND TEST ROLL 'Filed Dec. e, 195s Patented Sept. 17, 1940 UNITED STATES PATENT OFFICE COMBINATION STRAIGHTENING BLOCK AND- TEST ROLL Application December 6, 1938, Serial No. 244,298

This invention relates to a combination straightening block embodying test rolls susceptible to use with any straightening press table,

,I whether the press employed be of the arbor or '5' screw type, manually, mechanically, air or hydraulically operated, and it consists in the constructions, arrangements and combinations herein described and claimed.

It is the principal object of the invention to provide aligned straightening blocks with which there are provided test rolls movable to an inoperative position during straightening operations, but which are movable in a manner to elevate the work after release of pressure upon the work, thus permitting ready testing of the trueness of the work.

It is a still further ob-ject of the `invention to provide means for straightening and testing work without removal from the straightening blocks.

Additional objects, advantages and features of invention will be apparent from the following description considered in conjunction with the accompanying drawing, wherein Figure 1 is a fragmentary side elevation of a straightening table having my blocks and test rolls installed thereon and indicating the test position of the Work in full lines and the straightening position of the work in dotted lines.

of the units'.

Figure 3 is a top plan View of one of the units.

Figure 4 is a modified construction of one of the units. y

Figure 5 is a top plan view of an arm for support of a test roll.

Figure 6 is asimilar View of another arm employed in the unit.

There is illustrated a straightening table I of usual construction, embodying openings or slots I I for reception of foot members I2 of cornbined straightening and test blocks I3 presently to be described. The slots II will be spaced any desired distance apart beneath the downward travel of a ram I4 of a press, not shown.

The straightening blocks I3 are of identical construction and a description of one will sufce for a full understanding of the construction and operation, attention now being directed to Figures 2 and 3. The blocks I3 comprise end plates I5 of considerable thickness, the upper lends of which are provided with a V-shaped recess I6 for receiving and supporting one end of a tube, rod, shaft or the like. The opposite end of the work being similarly supported by a block Figure 2 is a vertica-l cross section through onev |3-al (see Figure 1). The V-shaped recesses I6 preferably have gradually tapering upper walls thereby accommodating work of varying diameters and as may be seen in Figure 3, the Width of the plates is approximately one-third of the Width of the block. In the space I'I thus formed between the plates, test rollers I8 are mounted, as will now be described.

A shaft I9 extends transversely across the space I'I journalled in respective end plates I5, and swingably mounted upon the shaft there are a pair of arms 2|] and 2|.

The arm embodies a forked end 22 apertured to receive a shaft 23, the latter revolubly mounting a roller 24, the other end of the arm having spaced ears adapted to freely fit between similar ears 26 of the arm 2|. The ears 25 and 26 have aligned apertures 2l for reception of the shaft I9. The arm 2| also has a forked end 28 apertured for mounting of a roller 29 by virtue of a shaft 23.

The arms 20--2I are of such length and the rollers 24 and 29 are of such diameter that when in testing position, the outer peripheries of the rollers will lie within the vertical sides of the rplates I5 and above the upper edges of the plates, as clearly shown in Figure 4, thus elevating the work to a convenient point for testing.

The larms 2li-2| are spring-actuated to their testing position and in Figure 2 one form is shown. In this instance, the base 30 is provided with diagonally positioned bores 3|, the bores being in line with respective depressions 32 formed in the connecting bar 33 of respective arms 20-2I. in each bore, the springs mounting at their outer ends a pin 35. The pins 35 have'a conical head 36 complemental to respective depressions 32.

In Figure 4, a heavy C-spring 3l is employed, the free ends being seated in depressions. 38 formed in the connecting bars of the arms. The spring 31 is anchored by means of screw 39. or otherwise.

In either form, the springs 34 and 31 hold the rollers in testing position, over-running of the arms being prevented by a stop pin 40, extended across the space II. The stop pin 40 is positioned in line with but below the apex of the V-shaped recesses so that the Work will be supported directly above the apex.

The rollers 24-29 are preferably offset with respect to one another, so that their peripheries overlap and this is accomplished by providing a hub one side of which is of greater length than A helical compression spring 34 isl seated the other and arranging the hubs upon their respective shafts 23-23, as shown in Figure 3.

The operation The operation will be readily understood from the following description, attention being invited to Figure 2, where it is assumed that the ram (not shown) has completed a straightening operation which involved applying pressure upon a high point of the work, indicated at W. Upon retraction of the ram, pressure on the work will be removed and the arms 2-2l will swing toward each other due to action of the springs 34-58 until they reach the position shown in Figure 4. I n such position the work will be elevated and revolubly supported upon the peripheries of the rollers so that the work may be rotated for testing by means of calipers or other devices or rotated to bring other high points into position for operation by the ram. Downward pressure of the ram upon the work will cause outward swinging movement of the arms 2-2i, until the work comes to rest in the V-shaped recesses when the ram completes its straightening operation.

While I have shown and described certain preferred constructions, this is by way of illustration only, and I consider as my own, all such modifications as fairly fall within the scope of the appended claims.

I claim:

l. A combined straightening and test device comprising in combination with a ram a pair of spaced blocks, each block having work supporting plates, arms swingably mounted on each block, below and medially of the work supporting plates, a roller mounted on the free end of each arm, spring means urging the arms toward work supported by the plates for elevating the work upon release of pressure from the ram, and stop means for limiting movement of the arms.

2. A combined straightening and test device comprising in combination with a ram spaced blocks, said blocks being spaced to the sides of the reciprocating travel of the ram, each block having a pair of upwardly opening work-supporting rests, a pair of upwardly extending arms swingably mounted in the block, a roller carried at the free end of the arms, spring means for each arm urging the arms toward each other for engaging and elevating the work, and stop means for limiting such movement of the arms.

3. The structure of claim 2 in which the stop means is positioned below the bottom wall of the work supporting rests and medially thereof.

4. A combined straightening and test device comprising in combination with a ram, spaced blocks, said blocks being spaced to the sides of the reciprocating travel of the ram, each block having a pair of end plates, each plate having an upwardly opening V-shaped recess, a shaft dis# posed transversely between the plates, a pair of upwardly extended arms swingably mounted upon the shaft, a revoluble roller on the free ends of the arms, spring means for urging said arms toward each other for engaging and elevating the work upon release of pressure from the ram, and a stop pin interposed in the path of travel of said arms, said pin being positioned beneath but in alignment with the apex of the V-shaped recesses.

5. A combined straightening and test device comprising in combination with a ram, spaced blocks, said blocks being spaced to the sides of the reciprocating travel of the ram, each block having a pair of end plates, each plate having an upwardly opening V-shaped recess, a shaft disposed transversely between the plates, a pair of upwardly extending arms swingably mounted upon the shaft, a revoluble roller on the free ends of the arms, a pair of diagonal bores in the base of the block, a bore being aligned with respective arms, a depression` in each arm, a pin seated in each depression, a helical spring on each pin and seated in `respective bores, said springs urging the arms toward each other in the direction of the work supported in the V-shaped recesses upon release of pressure from the ram, and a stop pin interposed in the path of travel of the arms, said pin being positioned beneath but in alignment with the apex of the V-shaped recesses.

6. A combined straightening and test device comprising in combination with a ram, spaced blocks, said blocks being spaced to the sides of the reciprocating travel of the ram, each block having a pair of end plates, each plate having an upwardly opening V-shaped recess, a shaft disposed transversely between the plates, a pair of upwardly extending arms swingably mounted upon the shaft, a revoluble roller on the freeend of the arms, a C-spring mounted in the base of the block, each arm having a recess, the free ends of the spring having seating engagement with respective recesses, said spring urging the arms toward each other in the direction of the work supported in the V-shaped recesses upon release of pressure from the ram, and a stop pin interposed in the path of travel of the arms, said pin being positioned beneath but in alignment vwith the apex of the V-shaped recesses.

7. The structure of claim 1 in which the rollers are offset with respect to one another.

HENRY A. DOHERTY. 

